Just thought I'd throw in my perspective of the current BW2 metagame, as there does seem to be a lot of discussion about weather.
After the hype of Rain, I'm starting to see a little more diversity in terms of weather. I'd definitely agree that Sun Teams are on the rise, with the advent of Genesect / Dugtrio being able to hit all weather inducers hard and being able to trap and revenge them at low health. Not to mention the increasing popularity of Magma Storm Heatran, and Giga Drain Venusaur are other reasons why Sun is doing so well, and is actually holding it's own against other weathers.
Sand on the other hand is also getting more popular based on my experience. I'm seeing a lot of teams using Hippowdon / Spikes stacker / spin blocker / Stoutland, which is a very effective strategy, especially with Stoutland getting access to Superpower gives Stoutland the necessary coverage it needs to sweep. Being able to hit common checks to Stoutland such as Terrakion is pretty big, and is no wonder why I am seeing a lot of Stoutland usage. There are also other interesting options to use in Sand such as Stealth Rock Terrakion and Sand Veil Gliscor who I have also seen increase in usage. Stealth Rock Terrakion makes for a fantastic offensive user of Stealth Rock, being able to force switches and get hazards up safely is amazing. Sand Veil Gliscor on the other hand has always been an annoying Pokemon to face. Given the popularity of Technician Breloom, Gliscor is one of the best checks to it, as well as being able to perform well against any type of team if Sand Veil does decide to happen.
Despite this, Rain is still the most popular weather, however the margin between the different weathers is quickly decreasing. Other weathers are becoming more prepared to deal with the common offensive Rain Teams everyone was using at the start of BW2. Teams carrying Specially Defensive Jirachi or Chople Tyranitar heavily limit the effectiveness of Tornadus-T, while Gastrodon and Amoonguss help take on Thundurus and Keldeo respectively. However, that is not to say that Rain Offense is still not effective. This type of team still easily plows through unprepared teams, and with hazards up, it can be very hard to stop. The only difference is that as time goes on, people will find more options to deal with it, in a lot of cases, unorthodox and common Pokemon have a certain niche at being able to counter certain common threats. I think at this stage of the metagame, people are trying to find those "unorthodox" Pokemon that perform so well in this metagame.
After the hype of Rain, I'm starting to see a little more diversity in terms of weather. I'd definitely agree that Sun Teams are on the rise, with the advent of Genesect / Dugtrio being able to hit all weather inducers hard and being able to trap and revenge them at low health. Not to mention the increasing popularity of Magma Storm Heatran, and Giga Drain Venusaur are other reasons why Sun is doing so well, and is actually holding it's own against other weathers.
Sand on the other hand is also getting more popular based on my experience. I'm seeing a lot of teams using Hippowdon / Spikes stacker / spin blocker / Stoutland, which is a very effective strategy, especially with Stoutland getting access to Superpower gives Stoutland the necessary coverage it needs to sweep. Being able to hit common checks to Stoutland such as Terrakion is pretty big, and is no wonder why I am seeing a lot of Stoutland usage. There are also other interesting options to use in Sand such as Stealth Rock Terrakion and Sand Veil Gliscor who I have also seen increase in usage. Stealth Rock Terrakion makes for a fantastic offensive user of Stealth Rock, being able to force switches and get hazards up safely is amazing. Sand Veil Gliscor on the other hand has always been an annoying Pokemon to face. Given the popularity of Technician Breloom, Gliscor is one of the best checks to it, as well as being able to perform well against any type of team if Sand Veil does decide to happen.
Despite this, Rain is still the most popular weather, however the margin between the different weathers is quickly decreasing. Other weathers are becoming more prepared to deal with the common offensive Rain Teams everyone was using at the start of BW2. Teams carrying Specially Defensive Jirachi or Chople Tyranitar heavily limit the effectiveness of Tornadus-T, while Gastrodon and Amoonguss help take on Thundurus and Keldeo respectively. However, that is not to say that Rain Offense is still not effective. This type of team still easily plows through unprepared teams, and with hazards up, it can be very hard to stop. The only difference is that as time goes on, people will find more options to deal with it, in a lot of cases, unorthodox and common Pokemon have a certain niche at being able to counter certain common threats. I think at this stage of the metagame, people are trying to find those "unorthodox" Pokemon that perform so well in this metagame.