I'll take this rumor with a pinch of salt.
From whats been quoted/mentioned in the article, yes, he could be talking about Tom Welling & yes, if you combine it with the cagey answer or non-answer he gave at the Smallville panel at Comic Con today in reference to the Superman movie role, you could well have a good arguement.. but then again this "source" (if indeed a legitimate one) could very well & probably 99% NOT talking about Tom Welling & indeed the answer/non-answer he gave at the panel means absolutely nothing.
There are several "popular TV actors" that could fit the Superman bill & would 'please fans', not just Tom Welling. Head over to the casting thread & you can see them all.
In all likelihood, this all means nothing. But I've said it before & I will say it again, at this stage I won't be ruling anyone out on the word of some internet blogger or a proclaimed insider source.
The fact that Ryan Reynolds was cast to play Green Lantern by WB, who has already played Deadpool in X-Men Origins: Wolverine & will almost certainly play the character again in Deadpool's own feature film if it gets some legs. As well as Chris Evans being cast as Captain America after previously playing the Human Torch in the 2 fairly successful Fantastic Four films.. well it all makes you wonder that if these 2 actors can play 4 different characters between them, 1 of said actors actually playing 2 from the same universe, then why would Tom Welling's previous association with a TV show containing the character in another universe/version hinder him even being looked at for a movie which is to be completely seperate?
Reynolds & Evans also played said characters in feature films that have been seen by alot more people that will have seen Welling on Smallville..
Time will tell, I'll cross my fingers that its true, but I'm not getting my hopes up. Something tells me that even if this was true & WB/Nolan/whoever did want Tom Welling, would he really want to continue to play the character beyond the 10 years he will have been doing Smallville..? seems doubtful, would probably depend on the color of WB's money but still.
Without getting into this whole debate, Heroes was cancelled because it was leaking viewers like a sieve. Whereas Smallville's ratings generally went up & down from year to year. Infact the only year there was a substantial drop in ratings & a successive decline in viewers 2 years running, was the year it went from Thursday to Friday.. which was only last season.