A significant part of the reason Thundurus was banned was because of Prankster. If its beast forme loses it (and gets Defiant as speculated) it might still be counterable in OU, especially if its defenses are lowered.
Is the loss of Prankster worth a potentially slight Sp.Atk increase? Only time will tell.
Landorus also has the potential of being incredibly dangerous. Its other ability is Sheer Force which is almost as good as Sand Force. It doesn't get a boost on EQ but Stone Edge and many of its special attacks do. Of course this is assuming its Sp.Atk stat doesn't get lowered, else Sand Force is way better.
Tornadus looks interesting. If it doesn't get Roost it will be the single biggest troll act ever done by GF after Rotom-S with Levitate. But if it does this means that its normal forme would most likely keep it and it gets Prankster to boot, which is a huge boost.
Bulk Up/Acrobatics/Roost/Brick Break has the potential of being a devastating set and has completely different counters from the standard Hurricane set.
Prankster Roost also means that the opponent will have to guess whether Tornadus is going to be weak to Ice or Fighting in that turn if he relies on priority to revenge kill it, which makes it even more annoying to counter.
Keep in mind that this is assuming the new forme get the hidden abilities. They could also have brand new ones and give the normal formes Defiant/Sheer Force as well.
IMO, it's a good thing that Tornadus gets a defensive forme. It desperately needed to differentiate itself from Thundurus, which is better than him in every possible way except it doesn't get Hurricane (but it gets Thunder instead so no big deal).
Is the loss of Prankster worth a potentially slight Sp.Atk increase? Only time will tell.
Landorus also has the potential of being incredibly dangerous. Its other ability is Sheer Force which is almost as good as Sand Force. It doesn't get a boost on EQ but Stone Edge and many of its special attacks do. Of course this is assuming its Sp.Atk stat doesn't get lowered, else Sand Force is way better.
Tornadus looks interesting. If it doesn't get Roost it will be the single biggest troll act ever done by GF after Rotom-S with Levitate. But if it does this means that its normal forme would most likely keep it and it gets Prankster to boot, which is a huge boost.
Bulk Up/Acrobatics/Roost/Brick Break has the potential of being a devastating set and has completely different counters from the standard Hurricane set.
Prankster Roost also means that the opponent will have to guess whether Tornadus is going to be weak to Ice or Fighting in that turn if he relies on priority to revenge kill it, which makes it even more annoying to counter.
Keep in mind that this is assuming the new forme get the hidden abilities. They could also have brand new ones and give the normal formes Defiant/Sheer Force as well.
IMO, it's a good thing that Tornadus gets a defensive forme. It desperately needed to differentiate itself from Thundurus, which is better than him in every possible way except it doesn't get Hurricane (but it gets Thunder instead so no big deal).