Here are all the skins that are supposed to be coming in next season. Human Torch is the only character that is getting 2 skins this season with one of them not shown yet.
These are the remaining who'll receive skins next season but haven't been shown yet
Human Torch
Hawkeye
Ultron
Spiderman
Mr. Fantastic
Invisible Woman
Zingodude even said they purposely left some stuff out of the preview. I hope Ultron gets a Wasteland skin similar to Peni's.