What are the "things to beat" this gen? The super OUs, the Skarm-Bliss, you know what I mean. What does every team have to be prepared for?

I was trying to make a stall team until I remembered that I have no idea of the metagame.
As far as I've been seeing / battling so far, very popular are:

- Aegislash
- Talonflame
- M-Mawile
- M-Gengar
- M-Lucario
- the usual Dragons: Garchomp and especially weakness policy Multiscale Dragonite
- M-Blaziken
- Azumarill

So I thought, let's make a team that specifically counters those Pokemon, just for fun and to expand from there on

I was thinking:

- M-Alakazam (counters Gengar)
- Avalugg (completely rapes every Dragon, even mixed sets will die because of Sturdy -> Avalanche, this might change once people start using entry hazards tho)
- Talonflame (for Blaziken/Lucario)

What does /vp/ think?