I think Abbas forgot to respond Olmert's package deal about the WB..few years ago, I don't think he actually got any evidence to back his threat, Israel gathered fairly enough evidence which is the only reason why nobody ever thought brought this idea in the past, with the on going "investigation" which is of course full of one sided [PALESTINIAN SIDED] members - to judge the evidence. -I think Abbas trying to ride the momentum and actually get something.
Palestinian Authority President Mahmoud Abbas expected to unveil his plan on Tuesday in Ramallah, present it to the United Nations next month • If the plan does not pass in the Security Council, Palestinians may try joining International Criminal Court.
Eli Leon, Daniel Siryoti, Shlomo Cesana, Mati Tuchfeld, The Associated Press and Israel Hayom Staff
http://www.israelhayom.com/site/newsletter_article.php?id=19655