While I would love to see both players in Green Bay for a long time, I doubt we are able to resign Willis. That is, unless the Packers want to pony up at least $10M+/year for him. I think he has proven his value this season, if and when he hits Free Agency, there is going to be a team out there that see's him as a Starter. Whether it is a long term starter or one to bring a rookie QB along, I won't be surprised to see a desperate team throw $25M his way.
Now I hope this doesn't happen, but if the Packers for some reason get to the trade deadline in 2025 with only 1 or 2 wins, then you trade Willis to QB needy team. Otherwise, probably the best path for the Packers is to keep him for another season (on his rookie deal) and then when he signs with another team in 2026, get a comp pick or an offset for a free agent that the Packers sign.
Willis is a much more talented QB than the Titans knew that they had. Future Hall of Famer? I doubt it, but he's young, so you never know.
If Gute wanted to really roll some big dice and Kahones, he trades Love and his big contract for a bountiful slew of top draft pics and keeps Malik as his starter. I am not saying I would want to see that happen, but hey, if the Packers REALLY like Willis, stranger things have happened.