I think Gasol could be revisited next year when he's up for a new deal.
Something that would help is that similar to Kemba, we've shown how someone with Gasol's skillset had success here. Always that Horford and Gasol were cut from a similar cloth with the defense, passing, and long range shooting.
Maybe next Summer Gasol would accept a more reasonable deal -$16-20 million-ish- to come play with Kemba and Tatum.