I can just see it now. Kalecgos will go back in time with this artifact, which will use up the artifacts power. He will meet his father (or grandfather? or just ancestor?) Malygos when he was just a proto-drake teenager pining after the still-living and very attractive (for a dragon) Sindragosa. A chain of events will ensue where Kalecgos - the cool, more-evolved new dragon in the area - accidentally causes Sindragosa to develop a crush on him instead of Malygos. This will create a paradox in the timeline, and Kalecgos will soon discover that if he can't get Sindragosa to fall in love with the nerdy magic-obsessed Malygos, he will cease to exist.
After many hijinks, and a confrontation with neighborhood bully Neltharion, he will succeed in his mission. But afterwards, he will realize that he's still stuck in the past and he needs to get back to the future. Because the bronze dragonflight can no longer help him time travel, he will need to restore full power to the artifact. How much power will that take? 1.21 gigawatts of power. Only one being is capable of such output: Galakrond. In the epic finale, the proto-dragon aspects battle Galakrond, while Kalecgos flies around continually trying to intercept a breath attack with the artifact. After a harrowing battle wherein Kalecgos has to scream "Hold DPS!" several times, he succeeds in spectacular fashion and finally gets Back to the Future.
Upon arriving, Kalecgos sees Jaina and has a tender moment with her where she's like, "You've only been gone a few minutes," and he's like, "It felt a lot longer." Immediately afterwards, Nozdormu appears in some weird gnomish vehicle powered by sands of time (Nozdormu is not proud that this is how he has to time travel now). He tells Kalecgos that he needs him to travel through time again, only now he needs to go to the future. Why? His kids. Something has got to be done about his kids.
Jaina turns to Kalecgos and says, "Our kids!? You bastard! You told me it was impossible to get pregnant with dragon kids!" Nozdormu then says, "Actually, you're not the mother." This is followed by Jaina slapping Kalecgos and saying, "You cheating bastard!"