New to WR, quick question.

I played league on PC for a long time, so I'm not exactly a new player, just new to WR. Are there any Champs that have been explicitly stated won't be coming to WR? I've been playing a lot of ziggs and syndra mid, but I've been missing the likes of Cassiopeia and Lissandra. Any hope of seeing them?

Also, a lot of people have talked about ranked matches having bots, and I had a couple, but my last few matches from last night were definitely players. But is there a way to discern early on players vs bots? Only iron 1 for right now but I should almost certainly be climbing