They did?
Not that those two have had any relevance to the show in almost 3 years, but bad-mouthing WB Features while you're still employed by WB probably isnt the greatest idea, although the only things I can ever remember them saying about Singer and Co was that they were pretty cool and open to a lot of the ideas the show was going to do back in Season 5 that didnt run afoul of what the film was doing.

I've never seen any interview where anything remotely close to any of that was said. Please, post a link.
I haven't kept the link as they did tons of interviews that I read in the past months and it was impossible for me to keep track of all of them. Maybe someone in here kept the link as there were others discussing this subject in here when that interview came out.
I remember another person saying they said they could never do a Superman suit on their budget with the standards they set for the show, so that may be another reason why they didn't do it. But they did announce the suit from SR at the comic con like it was something extraordinary and with a glow in their eyes that made me start questioning who was worse, them for thinking that that suit is something great or the fans who actually applauded basically validating their choice.
Warner Bros. has a choice to make in the coming months that it's gonna be a real hard one. Do they allow Tom to wear the suit or not.
If they do, it's just so Tom's fans will keep quiet about their dissatisfaction with the casting.
If they do let him, it will probably be the SR's suit. Not the way I want to see the show end after 10 years, to see Tom wearing that freakin' thing.
Common sense says they probably won't let him wear. I mean, let's be reasonable here and think business wise: do we really expect WB Features, the ones that kept Bruce Wayne away from SV because they thought ppl would be confused (even when they already had a successful reboot with 2 movies) to allow Tom Welling to wear (let's suppose) a newly made Superman suit to end the show when they know that image will be publicized WORLDWIDE by fans over the internet plus the ones who will actually see it, and allow that image (that I have no doubt will 10x better than the guy they've chosen) to be compared against the guy they're gonna throw millions of dollars in marketing (like they did with Routh) to chove down our throats as THE Superman and erase Welling from the hearts and minds of fans ?
Do we really think they're so altruistic and human that they're gonna allow that so we can have the ending we deserve and sacrifice an even bigger backlash and another possible faillyre ?
Given it's Warner Bros. - I seriously doubt it.
The way I see it (because if we'll see Tom in the suit it will be the SR one) anyway they choose, we loose.
On a side note, if we're to believe a current report, Snyder and Warner had nothing to do with the casting decision, it was all Nolan (which makes sense given the choice). It's sad that they really think this guy is the almighty God of movies.