That was a rumor originating from ProPaintball.com, but has not been confirmed by anymore from Tippmann or APS. As of now it seems very unlikely that any such deal will take place. I wouldn't hold my breath for any new Angel paintball guns being released at any time in the future.
Was at a big game this weekend and the latest rumor going around my area about the Angel / Tippmann buyout is that Tippmann purchased the rights to the ARK and the Angel Eyes! I thought it was funny just how many players were running with it even though there's absolutely nothing to back it up!
The problem is, there's not much of "Angel" left to buy. The Magno valve patent and their trademarks (things like logos and marketing names) is about the extent of the intellectual property registered to Angel Paintball. The rest was transferred to the individual Green brothers back in 2008.