Hey guys I'm back on the hype train for TI. Can anyone give me a rundown about new heroes I can expect to see and any meta shifts? Is it still running tri lanes?
To add on what Zaphid said, a new patch just hit like last week, so for now a lot of teams are still experimenting changes and shit. It'll stabilize in another month or so.
Current trends aren't too different than they used to be, as trends tend to be fairly cyclical. There's a come back of Dark seer for example, partly due to Sand King gaining a lot of attention due to his mechanics fixes letting him jungle with sand storm. For like 2.5years sand storm would not hit neutrals because they didn't want to code the "run away" mechanics on neutrals, now it's in so he can actually get a 10mins blink dagger off jungle creeps alone, which is obviously insanely fucking good. Invoker is pretty dominant again too, even though most people pick exort while the buffs were for wex, less strong mids against him so he does fine.
Defensive supports have become common again, with Shadow Demon, Treant and Dazzle being very common picks(dazzle was buffed quite a lot). As a result, AA became a common pick since he was buffed and hard counters defensive supports and heals. Skeleton King is actually played nowadays, mostly as a support but also as a carry, his ultimate is really good. Mirana is probably the strongest hero this past couple of versions, she was buffed a lot and she has replaced Windrunner as the "midgame with lategame potential semicarry utility suppport teamfighting do everything" hero. The second big new name is Centaur, who has become the perfect offlane hero, very tanky, can actually kill supports if they're being too cocky, very strong ultimate, only needs blink dagger to start playing, can jungle catch up or push lanes fast, can actually carry lategame if he gets farm.
Rhasta made a pretty strong come back with Lycan too, for push strats, as Necrobooks were made immune to Midas(but at the same time they now feed an insane amount of gold, like 200g each for lvl 3 necro which is a ridiculous amount if you don't micro them properly), but Sandking/Darkseer come back has dampened that quite a bit since both of them can easily wipe a team that's 15k gold ahead when they're pushing the base. Bat Rider still top pick/ban even though he's been nerfed a bit.
Check
datDota: Heroesand filter for 6.81 to see trends.
Oh and forgot Ember Spirit, fuck him.