Hmmm...I'm not 100% sure myself. Covering them in depth would definitely be good, as I'm sure there are people who want information on the spin-offs and a place that provides them would definitely be nice. And if we do cover them proper, it wouldn't seem like we're simply brushing them to the side.

At the same time, certain spin-offs neither seem to be localized or garner much attention by fan translators, so until we get someone who actively feels like perusing the Japanese material and can translate it properly for us to summarize, I don't think we can cover it in depth yet.

Addendum: Though, in the case of SD, Victory Mission, and the like, if they do have scans at the very least, I see no reason not to cover them in-depth. Especially when they have their on ongoing characters and storyline, like Victory Mission does.

For Narutopedia, there is a Springtime of Youth Wiki and a Sharingan Legend Wiki, so Narutopedia does not need to cover their spinoffs extensively. Is there a reliable DB SD wiki and a reliable DB Heroes: Victory Mission wiki? If not, then I guess it's up to us to cover them, if possible.

What @WS7125 said, if there's no other wiki dedicated for those spin offs we should cover them, as we are a wiki dedicated to the DRAGON BALL franchise in general, though i'm unsure how much info is avaialable/translated for each respective Spin off.

This rises a question, how are we going to handle the pages from certains characters ?

Victory Mission is a tough cookie. I can find a good bunch of raws, but nearly no scanalations. Mangastream has all but one chapter of SD, and all of the Episode of Bardock, so that will be no problem. As for canon/anime/movie characters that appear in these spin-offs, this information will "In Other Media" section.

Victory Mission follows into the far future when there are no human with Saiyan DNA left so the use the machines to go to a game dimension right? 

Victory Mission takes place during the time of Goku Jr., the Saiyan descendant of Goku 100 years after the events of GT. So, Saiyan blood still exists.

I didn't know that. That makes it in the GT/Movies Dimension then, coming after both the Movies and GT..

I think we should cover the events. It's Dragonball related, to the point where it takes place in the setting of DB. Also, it's a bit different from the SD spin-offs taking into considersation that SD it's clearly it's own universe. Yes, it takes place in Konoha, but it takes place in a more 'cartoony' form of it. As Ten-Tails states; 

"Victory Mission takes place during the time of Goku Jr., the Saiyan descendant of Goku 100 years after the events of GT. " 

Although, GT is non-canon, i'm sure we're still going to cover the series, in this wiki as long as we hold the paramters that it's a anime-only 'spin-off'. Where we will have to watch GT (poor us, don't worry I have an HD version of it, a couple of beers will help this process)-to create the pages. With that being said. I think the same should apply for Victory Mission. Because it presents many 'non-canon' transformations that are from characters of the series. Such as SSJ4 Broly, SSJ3 Gogeta. I think we should allow the readers to know this isn't 'official'. But I see no problem covering the series - That's just my 2 cents.