This deck does not look good nor consistent.
Sure there are plays where you don't care what you are discarding, cause you'll get them back with Hela.
There just isn't enough 6 power cards that can build a theme around Cerebro for. I never realized how many 6 power cards are in the Discard theme, but this is a high risk high reward build, as each card under Cerebro/Mystique will be a 10 power which is crazy, if you have a 4 card location, as that'd be a 40 power location...Hela can easily make this happen, but you could get goblin'd if an opponent has a filled location where Hela plays any Goblin.
I think Red Guardian will be a staple for Cerebro 6 in the future, and his ability isn't really bad. Future cards like Silver Sable really benefit from Red Guardian, since he is a 6 power, and she needs a location with minimally a 6 power location, and the way Red Guardian is worded, it looks like you aren't forced to only play to that location, it seems like you have to at least play A card to his location "next turn" so it might be more like a reverse Morag, where your first card HAS TO be played to Red Guardian's location, then you could play cards elsewhere...
*Edit* Subbed out Groot for Punisher, cause I forgot about Punisher was a 6 at full power and thought it would be more consistent.