It most probably will be a Brando. If by the two Oscars HT means best actor awards, here's the list:
Spencer Tracy (1937, 1938)
Fredric March (1932, 1946)
Gary Cooper (1941, 1952)
Marlon Brando (1954, 1972)
Dustin Hoffman (1979, 1988)
Tom Hanks (1993, 1994)
Jack Nicholson (1975, 1997) -also Best Supporting Actor, 1983
Daniel Day-Lewis (1989, 2007)
Brando is the only one who was last seen in a movie in 2006. I hope it's a young Marlon from The Wild One.
I hope we`ll see a Jack Nicholson from the Shining eventually,i would be all over that!