With the introduction of champions, I’d like to see an option to place unused covers in a special area for holding onto. For example, I recently got a Purple Mystique Raven Darkholme, my current Mystique’s purple in my roster is full, but I’ve only used 7 of 13 covers to upgrade her. I’d like to place the new purple in a vault/freeze it somehow, so that when I click sell all I don’t sell this one by mistake as I want to hold on to it till I get the next 6 covers and am able to use the Purple as part of the champion upgrade.
This could be another limited resource, so it’s not as resource-intensive as the idea some have suggested for just never making covers expire.
You could have a cover bank with maybe one slot for every five roster slots you have. Once you put a cover in the bank, the only options from there are train, recruit, and sell – you can’t return them to the normal queue.