Okay, so this is all just light speculation. But, it is always possible that Bioware may have been hinting at something.
In the Temple of Mythal, while most of Elven Pantheon's mosiacs are located inside with the section where Abelas is, there are four mosiacs located in the section where you complete the rituals. First, is the location of Falon'Din's and Andruil's:
On the left side of the front door are two mosiacs of Falon'Din:
Then, two mosiacs of Andruil on the right:
These two are the only mosiacs that are placed as such. It should also be noted that they are as well the only two that Solas comments on.
Next, are the other two Mosiacs that are located in the ritual section of the temple, though these are in different locations. They are June's:
And of course, Fen'Harel:
So, what could this mean? Probably nothing. I do believe it is notable, however, that Solas only comments on Andruil and Falon'Din, along with their mosiacs having a bit more prominent display than any of the others. We know that both Andruil and Falon'Din came into direct conflict with Mythal. If there was a some type of team up between the Gods, I am thinking it would be Mythal, June, Fen'Harel vs. Adruil, Falon'Din, Dirthamen. And if the theory about the last two Gods, Razikale = Andruil or Dirthamen, and Lusacan = Falon'Din or both Falon'Din and Dirthamen, I'd say that Mythal is finally about to have her revenge.