Freeroamer
The greatest story of them all.
Fire Blast? Go hard and Blue Flare more like but yea, this was one of the things I first thought of, or Earth Power to stop even Heatran trying to check youFire Blast Lati@s can decimate unprepared teams.
Landorus with STAB Flying moves sounds horrific, and something every team will need to be able to answer. I can see this being an extremely offensive metagame as everything will be running moves to get around things that would normally wall them, meaning said walls are obsolete.
I think having a way to deal with Sleep will be essential due to all the spore flying around too, but then again it'll be impossible to predict where it's coming from because everything can now viably run it.