Q:
Strong Blooded Jotun
I doubt you’ll find any canon images, given that we don’t honestly know much pre-elder dragons and I doubt anyone can show you a real picture of the jotun back during their prime.
Yeah, there isn’t likely to be anything depicting their old state. Concept art is used for conceptions of possible in game things, so you’ll find concept art of Jotun as you see them now/similar to now, but not their past form.
There are some in-universe depictions/descriptions, according to an NPC in northern Dredgehaunt (the Priory base in jotun ruins, forgot location and NPC name and too lazy to look it up atm) which says that according to what they’ve found, they looked a lot better than they do now.
But I doubt we’d actually see these things, unless those ethereal faces in GW1’s dungeons were ancient jotun.
Stop treating GW2 as a single story. Each Season and expansion should be their own story.