What's interesting to note is that the weathers will truly live up to their intended styles.
Sun/Rain are often highly offensive styles, especially the latter, and will no doubt be all over the place.
Thanks to its stats and type, Tyranitar will no doubt be able to put a halt to the Drought, summoning up Sand in the process and completely changing the momentum.
Meanwhile, Sp.Defensive SubSeed or ScarfAbomasnow has little to fear from most rain sweepers, except maybe Kabutops and Swift Swim Armaldo, summoning a hailstorm to halt their sweep.
Offense vs. Defense on a whole new level.