Well, the good Mr. Pawlus said one figure is part of the set.
It would seem that the Evo trooper is being re-released in The Legacy Collection Basic line. I'd rule this guy out as being included in this set.
As for the Republic Commando and what looks to be a Storm Trooper (EVO Trooper as well, I guess), I cannot help but think that EE would not want to sell Clone Trooper focused sets as exclusives for two consecutive years in a row, especially as one is still available.
Bultar Swan, in that outfit, is way to obscure to be in the set I think, unless the theme is the comic Purge. The hard idea to grasp is that the set would most likely require all-new figures if that were the case.
If Darth Nihlus is included then the theme would most likely be KOTOR. This theme would most likely require most of the figures to be new, and that hasn't really been a trend with the EE exclusive sets.
Now, the last figure is the Rebel Pilot. Can't really tell who it is due to the lack of color, but it's definitely based off of the Vander mold. Now, a Rebel pilot theme seems to make the most sense. Pilots, especially Rogue Squadron, have quite the fan following and demand to warrant figures of the characters. Only one or two figures in the set would have to be all-new, if even that many, and that would fit the precedent set by the Mandolorian Exclusive sets of last year. This seems like the most likely idea because it would be easy to create all-new characters desired by fans, which would lead to many sets being sold.
Mr. Pawlus, might I be on the right track here?