I see a lot of these posts saying that Imrik should be picked over Eltharion due to, essentially, his connection with dragons. I'm here to argue that from a gameplay and story standpoint, Eltharion should be the next Lord for the High Elves. Let's take a look at Imrik for a sec. What does he bring to the table? Well he'd likely bring bonuses to Dragons and Dragons princes, and bring his own special Dragon mount to the game. I feel this would make him a great candidate for FLC, but not a DLC lord. I feel like he wouldn't bring anything interesting aside from a stronger prince on a Star Dragon with some more special abilities and giving buffs to endgame units that are already very powerful. Not only that but there is a 9/10 chance that the next lord pack with the High Elves will pit them against the Greenskins, and Eltharion fits that rivalry way better than Imrik. I hear that he would have a Dragon Awakening mechanic that would fit his lore, but what would that mechanic be exactly? Would it just make Dragons cheaper? Make them easier to recruit? Give more buffs on top of what he already gives them? Doesn't sound too interesting to me. And a lot of people complain about Eltharion's lore, but Imrik has even less to work with. His lore is pretty much just "He has a special dragon as a best buddy and flies around the world." Is that really more interesting than the Grimm.
From a lore and gameplay perspective Eltharion just offers more to the table. First off, he fits a Greenskin rivalry much more, given his relationship with Grom the Paunch. Having Grom but not Eltharion in the next DLC would be like having a Batman tv or movie series without the Joker. There would be a clear part of the character missing. Eltharion also brings a new mount in griffons, and has a more unique play style as a hybrid caster/fighter lord. I hear some Imrik fans say that his relationship with Grom is all he's got, but this is far from the truth. He was the first Elven prince to successfully attack Naggarond, broke several Greenskin strongholds after Grom disappeared, and plays a large role in repairing Waystones. In fact these waystones could play a large part in his campaign, where he's traveling around the world to protect or repair them. He could have special missions to protect waystones which would result in a battle against a Greenskin hoard, and if he wins the stone is saved and grants money and buffs. He could also have the ability to build certain waystones in new provinces, which would grant buffs to magic, replenishment and supply buffs to certain units depending on the type of waystone (I know there really aren't types of waystones, but it could be a cool way to encourage different unit builds.) One idea I had way a Waystone map that shows where certain stones are, and capturing them would grant buffs but you would need to fight a large battle before securing the stone. There is so much you can do with a Waystone mechanic for Eltharion.
All in all, I just think Elthation offers more than Imrik as a DLC lord and will be the most likely option.