I really think that Queen should release a complete uncut remastered rainbow performance in 1974. They do have footage of those two nights, they shouldn't have a reason not to besides that's its already been out in 1992 on VHS. The Wembley show was originally released on VHS before, and its been re-released in 2003 on DVD. They should absolutely do this w/ Their Rainbow concert, make it in BLURAY too if they can.
Im sure there is an excelent version of the performance in the archives. To prove this, look at the Now Im Here video that was in Greatest Video Hits Vol. I disc 2. That footage is exceptionaly great! Why shouldn't they do that w/ the whole concert?
If there is someone w/ power and authority of Queen Productions that reads this, PLZ take this in consideration!!!!!! many fans will be pleased! i kno i would!