I really hope there's closure for the inquisitors who romanced Solas in future DLC - although if there's any possibility that the inquisitor can run off/disappear they would leave that for the very last story DLC they intend to release.
Also I really would like to continue to play the inquisitor in future games. I know they seem rather set on having a new player character for each game but let's face it, the Inquisitor is the most powerful/influential PC they've had so far. Far more than the HoF and definitely more than Hawke. Especially since there's no real way for the Inquisitor to die at the end. The HoF could die and if not they always disappeared at the end of DAO in the epilogue. Hawke always disappeared at the end of DA2 even if they were Viscount. But - for now at least - you still have the Inquisitor at the head of a large, country spanning organisation.
Given that there is no post-epilogue save that takes you to before the end events of the game (as there is with DAO, DA2 and even ME3) it leads me to believe that all DLC will most likely be post ending.