I've been thinking public domain stuff a lot lately, and I just came up with an idea I really like for Public Domain Pooh, but also wouldn't really be tonally compatible with the sort of games I desire to make:
Pooh as a wise, but not smart, Yoda-like mentor to an action hero - taken almost completely seriously, Pooh would still have his trademark naivity; love for hunny; and fear of Heffalumps, but it wouldn't really play onto the "you didn't expect to see Winnie here!" angle, no Disney or China metajokes. Pooh is a warm figure who's known for making up for foolishness with sheer wisdom; and lacking any sense of hostility, so he would make a reallly good "elderly sage" figure in a fantasy setting - seeming like a fool from a glance, but reeling the hero and their team back when they're about to be driven to drastic measures.