I'm watching a "Super Dragon Ball Heroes special" and it has the size of a Dragon Ball Super Heroes anime episode, but it has 2 characters that doesnt appear in the anime, a fight between Gogeta and Vegito (I dont think this fit at all in the anime) and a videogame-like format, after one fight a "K.O.!" sign appears. Is the Super Dragon Ball Heroes special part of the Super Dragon Ball Heroes anime story?
Super Dragon Ball Heroes is an fan-made anime going with great popularity and anything can happen in fan-made animation. Although the release date of Dragon Ball Super 2 is not known yet but if you can read the manga for that if you are excited for that. Current arc if of Goku UI vs Moro is going on in that manga.