If you don't want to read any spoilers about the upcoming Blackest Night/R.E.B.E.L.S. crossover stop reading now.
Via Newsarama's article on Orlando's Mini-Megacon this weekend:
Finishing out the floor buzz today was Tony Bedard, who is still hard at work with R.E.B.E.L.S. for DC. Issue 7 just hit the stores, and right now, he is working on the Blackest Night crossover issues, 10 and 11, which should be out in November and December. He’s really excited about the crossover, as not only will a bunch of new people be exposed to the book, but it has been a lot of fun. Bedard said they are throwing everything into it – two Black Lanterns, the Sinestro Corps, Starro and his Good-Time Gang, Vril Dox and his crew. This obviously raised the question – who will the Black Lanterns be? Bedard revealed that one will be Harbinger (from Crisis on Infinite Earths fame) and the other will be Stealth, who was a member of L.E.G.I.O.N. In addition to that crossover, he said he was thrilled to have worked with his old Route 666 partner, Karl Moline, who drew one off the chapters in the upcoming R.E.B.E.L.S. Annual, which has other chapters by Kalman Andrasofszky, Derec Donovan, and Joe Prado. Beyond that, Bedard hinted that early next year, R.E.B.E.L.S. will be crossing over with one of DC’s flagship books, but he couldn’t specify which, since the details are still being hammered out. Then, after that, he said he is really excited about next year’s big event, which should have fans excited with Geoff Johns and James Robinson at the helm of it. Bedard said he feels very confident about the direction they will give it. He added that both Johns and Robinson have told him how much they are enjoying R.E.B.E.L.S., “which is the nicest thing to hear,” he said with a smile.