RTNP was made using unused material from Unreal and new stuff. foundry and toxic are CliffyB maps and are pretty good.
U2's opening is like the 64k demos out there, checkem out sometime google it up.
Gears may be winding down, would there be a gears 4? Rumor I heard Gears is an offshoot unreal storyline.
U2 isn't ..bad, but too short of a game but didnt continue the U1, but hints on the UT story. U2 did have EPIC creative input, I guess EPIC got Legend to do it prolly because they were busy on UT.
They are working on the new Uengine and they will have to make a game to show it off, so it makes perfect sense to do an Unreal 3. As far as UT goes, just mold it into U3's MP content, like you actually make 2 games into 1.
Theres a thread on the EPIC site that delves on U3 also user created, so people talk about wanting a U3. Well, Mike Capps commenting probably helps set a stir to get a U3 going. Personally, I would love to see as many of the original Unreal guys helping on the project including the music guy. Point about that is the creative meld that made unreal work. Putting those minds on it would help.
Probably the UT3's storyline is stuck needing a sequal so it makes sense to make like a UT3.5.