Probaly, if the UFC couldn't pay him enough then there's no way in hell Strikeforce would be able to afford him. That and theres nobody for him to really fight there anyway.
Rampage
Yes. UFC 151 was cancelled. It was scheduled to happen on 1st September 2012 but was cancelled when the main-event fighter Dan Henderson pulled out due to an injury. The light heavyweight champion Jon Jones was supposed to fight Henderson for the title. Chael Sonnen offered to take Hendersons place for the title but Jones refused to take a fight with just 8 days left to go. As a result UFC had to scrap the event because it had no Main Event.
Kimbo Slice is no longer part of the UFC roster. He used to fight in the UFC but left them in 2010. He is currently a professional boxer. He had only one fight in the UFC which he lost. The fight was at UFC 113 against Matt Mitrione which he lost by TKO. He did not fight for UFC again after that.
Dan Henderson was the first person to hold the middleweight and light heavyweight belts at the same time
UFC 161 Evans vs- Henderson - 2013 was released on: USA: June 2013
UFC Unleashed - 2005 Rua vs. Henderson was released on: USA: 27 April 2012
UFC Unleashed - 2005 Rua vs- Henderson was released on: USA: 27 April 2012
UFC 164 Henderson vs- Pettis - 2013 TV was released on: USA: August 2013
UFC 93 Franklin vs- Henderson - 2009 TV was released on: USA: 17 January 2009
UFC on Fox Henderson vs- Diaz - 2012 TV was released on: USA: 8 December 2012
UFC 93 Franklin vs- Henderson - 2009 TV is rated/received certificates of: Australia:MA New Zealand:R16
UFC 75 Countdown Jackson vs- Henderson - 2007 TV is rated/received certificates of: Australia:MA