It's not a problem. Hell, the Vikings were signing defensive tackles while paying Cousins.Who says he will agree to a contract with multiple fake void years? Why should he? They can do an extension and get his cap # down to $35 million or so, but that's it. He's not going to agree to some BS contract that locks him up through 2026 or anything like that.
They can run it back certainly. They will be very hard-pressed to bring both Rodgers and Adams back. If they do, they won't be able to upgrade much of anything and will downgrade in some spots. Can they still win the Super Bowl? Maybe. It is likely? No.