I'm not sure what you mean by happen "with." But, as a random online, my prediction is that nothing will happen. The whole media hubbub came and went, and IIRC Thomas slowed down the gift getting afterwards. I don't see anyone bringing suit or admin action or something.... I guess it's not impossible if and when Democrats gain control in 2028 they'll try something, but probably not, given the time separation and the desire to avoid the appearance of lawfare.
If Thomas becomes disfavored by rich conservative activists because he refuses to retire when Trump has an opportunity to safely replace him with somebody decades younger, do you think those rich conservative activists will keep spending millions of dollars on him?