It isn't known which Marvel title the studio is looking at Tom Welling for, although there are planned adaptations of Doctor Strange, Runaways, and Deathlok on the horizon. Tom Welling was also in the running for the Huntsman in Snow White and the Huntsman, although Chris Hemsworth accepted the role, which we reported yesterday.
There is also the possibility that Tom Welling may reunite with Smallville creators Alfred Gough and Miles Millar with the Quartermain reboot they're producing.
We reported just under a year ago that Sam Worthington was attached to star, although that does not seem to be the case anymore. It isn't known if Alfred Gough and Miles Millar have offered the role to Tom Welling, although insiders suggest they are "keen" on working with him again.