A quick perusal and this is all I have seen:
"Whenever Marvel has “reasonable” rights for rejection of approval hereunder, the basic criteria to be used by Marvel may include inconsistency with (i) basic story line, (ii) the powers, (iii) basic personality traits, (iv) physical appearance (including clothing or costume), and/or (v) living habitat or environment relating to such character as portrayed in Marvel’s exploitation of such character in comic books or other products for the particular time period being depicted by MCA."
Remember, at the time, there was no MCU. If UO wants to portray MCU, it is well within its rights.
http://www.sec.gov/Archives/edgar/data/1262449/000119312510008732/dex1057.htm