You should mention that Latios is a solid check to Thundurus-T, and it's still awesome to check old threats like Terrakion, Virizion, and Celebi.
~ Thunder deserves an AC mention on the choice set. It provides some awesome coverage in the rain, in combination with Rain-boosted Surf and STAB Draco Meteor. It should go over Trick / HP Fire.
~ You could also AC mention Dragon Pulse for late-game clean up without the special falls of Draco Meteor.
~ Magnezone support is always welcome to remove Steel-types so Latios can spam Draco Meteor / remove Scizor.
~ AC mention Draco Meteor. It lets Latios to nuke stuff early on even without Calm Minds.
~ Draco Meteor should be the primary option. Latios is meant to set screens and die - it does not really care much about the special drops.
Checks and Counters:
~ Mamoswine's Ice Shard makes it a solid counter
~ Specially Defensive Heatran is a solid switch-in to Draco Meteors
~ Scizor with some special defensive investment can tank a Draco Meteor; it can always come in on a revenge kill after the special drop and Pursuit / Bullet Punch it.
Your AC comments for each set really lack on teammate information. I would check out the SmogonDex's entry of Latios
and make sure to include all the teammate information for each sets provided on-site already.