I read about this earlier in the week and while WWE & Syfy are currently talking about shifting it to Thursdays, I have a feeling it'll happen if WWE really wants it to. SmackDown! will have been on Syfy 4 years October 3rd and, to my knowledge, the only show to draw more viewers for Syfy than the blue brand in all that time was the Sharknado sequel that aired late last month. That gives WWE leverage that can't be discounted or brushed off.
I dunno if anyone else has mentioned this, haven't read through all the responses yet due to time, but this does raise some potential issues. If it moves, SD! will probably be going up against Impact Wrestling if TNA & Spike can come to terms on a new TV deal. I know that some people will be all "Yeah!!! Thursday Night Wars!!!!" even though the days in which TNA had the remotest chance of waging a ratings war against WWE have been gone for more than four years now. A much more substantial threat would come in the way of football making its return to Thursday nights come the fall-winter seasons. Since NXT also airs on Thursday nights, WWE could always simply move it to another night. One of the benefits of owning & operating your own network is rearranging programming schedules to your choosing.
Personally, and I might be wrong on this, but I think it'd be a good opportunity for them to take the show live. All in all, there've been few programs throughout the year that've challenged SD! on Fridays when it comes to the combination of overall viewers and key male demographics. Some that have include some baseball or basketball playoff games and a few reality shows on Discovery Channel. On Thursdays, WWE will not only have to contend with football but with huge network draws like The Big Bang Theory & Two and a Half Men. There's no way SD! will put a dent in The Big Bang Theory, though interest is definitely down in 2.5 Men compared to recent years, but not remotely enough for SD! to pose a threat. Going live might be something that can ultimately help cushion SD! and prevent being obliterated by the ratings giants on Thursdays this fall.