Apparently (A.K.A. according to the wiki), there was a scene in the epilogue that didn't quite make the cut, were Varric meets back up with the champion. When Varric tells her (or him I guess, not sure what the qualifiers for this scene would have been) that he told the chantery seeker "everything", Hawke asks, "everything?", and Varric replies, "Don't worry, I left off the part about us".
Varric is a storyteller, a buisness man, and a compulsive liar. He's also the one telling the DA2 story to a Chantry Seeker, someone he doesn't know if he can trust. If I were him, I'd keep any potential relationship with Hawke to myself as well, incase Cassandra tried to use that information as leverage.
Basically, pretty much everything in DA2 can be handwaved as embellishment, omission, or Lies.
It made me mad to find out the developers actually axed a cut scene at the end of DAII when Varric left Cassandra. He was supposed to meet Hawke outside the city and, if you hadn't romanced anyone else (as female Hawke mind you) Hawke asks Varric if he told her (Cassandra) everything, and he was supposed to say "not the part about us".
I wouldn't worry too much about it though. When you think about it, every time you click on a new game, you basically open up an alternate universe where your Champion of Kirkwall can exist, because s/he can't exist at the same time and place as every other playthrough. (Kirkwall would be crowded with too many Hawkes too quickly.)
Plus, BioWare themselves opened up the possibility of Alternate Universes when they created the Darkspawn Chronicals DLC, which was centered around the idea: "What if the Warden didn't survive the Joining?" Even though it's not officially canon (as the Warden survives and kills the Archdemon no matter what), it's still an interesting foray into the "what if?" If they can officially do so with darkspawn, then we can unofficially do so for race selection and romance. ^^
I like Anders and love Fenris, but they create more drama than high school girls right before prom. Sometimes I get really tired of their whining, angsting and bickering and just want to "go home" to someone fun, easy, and enjoyable to be around... and Varric is often the first person to come to mind.
I'll admit I never fully considered Varric that way until viewing your photos. Before then, it was a wistful, "What could have been..." but afterward it became a serious possibility of: "Wait, if he was an option, what could have been?" (Plus, Varric only says, "Too bad I'm not into humans." He never says anything about elves or fellow dwarves! )
Maybe it's because my own husband is so fluffeh, but I always wanted Varric for a romance. Anders is a weak storyline who is nothing like the man we knew and wanted in Awakenings, Fenris is just purposefully argumentative, and I don't swing that way for Isabella and Merrill, so I guess I just wanted somebody that it was easy to love. Or, more to the point, who it wasn't harder and harder to love as the tale wore on. Though, to be honest, I'd have 'gone gay' for Aveline. Now *that's* a woman! If I'd done a male playthrough, I'd have wanted to romance her.
B-b-but, Aimo, if you quit Varric/Hawke, how else will we ever get to enjoy the Best (non-available) Romance with the Paragon of Manliness? By the time he rolls out the line (paraphrased) "I think I'm sick of the whole lot of templars and mages" I'm screaming at my computer, "YES! Why couldn't you have been the sane option, Varric?" Ah, well, as you say, perhaps in another life. Thanks for the Varric-tine, Aimo!
Eh, don't feel bad about them not being officially canon. My Champion of Kirkwall became an elf in my personal headcanon a long time ago and I don't feel too bad about it. Every game is like an alternate universe, right? On top of that, Varric is an unreliable narrator. Whatever "really" happened is up for personal interpretation.