It's kind of a shame about Jotun. If ever there were a chance to make use of him, it was with the release of Ulduar. Yet true to form with raids these days, Ulduar exists in a bubble of time and space entirely cut off from the actual quest mechanics and sense of linear story progression in the outside world.
Of course, the same could be said of the Explorer's League. Ulduar could've been their time to shine as a faction, but instead they're shoehorned into the Alliance Vanguard when at this point they should probably just be a neutral faction, since the players in both the Horde and Alliance are basically raiding Ulduar at their behest (not to mention they were indirectly involved in helping both factions in Silithus as well).
If Blizz really wants outdoor raid bosses, they should just make them outright unbeatable to begin with. Anchor them to a tether to prevent kiting, give them an insanely high boss level, massive health/armor/avoidance, unprecedented damage output and resistances, and no loot table (to start with). Render them unkillable, and let them stomp around for an expansion or two (or more. why not?), daring guilds to try the impossible and challenge them. Then gradually sync their stats and behavior toward the player levels with each expansion, until when Blizz finally decides to end the whole thing, they render the bosses killable and allow max-leveled and geared players to take a crack at them in the last expansion.
Just imagine, a dozen or so mysterious Titan constructs each roughly the size of Wyrmrest Temple, spread out and marching at the bottom of the sea around the entire perimeter of the known continents. Untouchable for years and years (literally) by even the most powerful players and raining doom upon any foolish enough to try their hand at it with each progressive increase in gear and stats as expansions bring higher levels and ever-stronger loot and encourage guilds to try, vain though it is. Then the final expansion pack comes along, and at long last the world's champions are expected to confront these monolithic behemoths as part of a quest involving an endgame raid. And with each one that falls, those within a certain proximity gain a sizable timed debuff preventing overly-aggressive farming by any single guild.
...ok, got a little bit carried away there...
I just miss the days of the occasional grossly over-leveled elite laying waste to entire groups of questing players, keeping people on their toes even in zones they outlevel. Lvl 35 Mor'ladim, how I miss you. Even as a lowbie alt, Duskwood just isn't as frightening these days.
But hey, there might still be some hope for Jotun. If they really try to bring things together in the end of WotLK, we may not have seen the last of the Titans' children in this expansion. Arthas just might end up with a pissed off army of Earthen, giants and Watchers knocking on Icecrown's door alongside the mortal races as payment for the debt to the players for defeating Loken and Yogg-Saron. After all, seems like when he reappears to confront Arthas (and it seems likely he will), Muradin might at least bring some Frostborn along.
Or maybe someday they'll toss in a few class-specific quests like the old-school hunter ones back in the days of MC and BWL, and have players go kill him for some quest drop that goes into building an epic weapon.