Aamir & Shahrukh on screen together , a possibility ?

Its like the kamal hassan - rajnikanth story, both equally powerhouse performers down south, one started off as a hero while the other like a villan , very much as was the case of aamir & shahrukh khan. The former did work with each other in their initial days , however aamir & shahrukh have never shared screen space together. Aamir even refused to do the dance sequence in om shanti om , perhaps its the insecurities or the comparisons , but the people would really want to see them on screen together , especially with rani & kajol. Mani ratnam is almost pulling off an kamal hassan - rajnikanth starrer, will there be any production house in bollywood big enough to pull in the bollywood superstars ?