1. Bring back the Legion of Super-Heroes. Don't make the continuity and history any more convoluted. Just make the team the Pre-COIE Legion and give them a great creative team who knows the characters and publicize the heck out of the book.
2. Give John Stewart his own GL book. The guy has as many fans as Hal or any other GL and deserves his own book. Personally, I'd prefer Tomasi to write it, but I would be happy with any writer so long as they did an amazing job on it and really brought John back to the forefront of the GL mythos, not playing second fiddle.
3. Bring the REAL Wally West back. I don't care how they do it, just make it happen. And I would either have Waid writing it or someone who loves the character and would write him well.