Check out dragonball online
It's a game, it's not in english, but it's meant to be the (quote unquote) 'true' sequal to dragonball Z some fans say, and toriyama has been working on it apparently. People do translate a bunch of the info, and you don't have to speak korean/chinese/etc to be able to look at promo art and screenshots so it's all good.
It does seem pretty neat, though you take it with a pinch of salt since it's a game and therefore some of the story/aethetic stuff was done solely as pandering to fans in the game.
(eg. all the player-created humans apparently have a tiny bit of saiyan DNA, which means they can make a wish with the dragon to unlock super saiyan. As i said, obviously done as a bit of super saiyan fan service)
It doesn't count GT as having existed, and is set hundreds of years after Z (though apparently you time travel to various points in dragnballs history)
There's a group called the time breakers, who are messing around with the timeline. There's a 'time patrol' trunks who goes around trying to stop them.
Majin buu makes an entire race of majins, namekians move to earth after the time breaks destroy new namek, there's also the 'red pants army'(basically red ribbon army v2) and evil namekians which look pretty bad ass (they have an evil korin and evil popo! to go with their evil lookout tower and presumably evil kami
i make it sound stupid when i say it like that bit it looks cool from the concept arts and stuff i've seen.) and all sorts of other cool stuff if you're into dbz and want to check out some new 'material'.
I guess there's also dragonball heroes, some arcade machine card game thingy, that's neat cause they have some promo videos which are actual new dbz animation things, and some new character designs (eg. 6 saiyan 'heroes' [3 male 3 female], 3 namekian 'heroes', 3 majin 'heroes' and 3 frieza race 'heroes').
But no, I don't think they will make a proper new dragonball series. Maybe some OVA and promotional animations, but thats about it. It's a shame cause i think they could potentially make a pretty neat new anime series about dragonball online. Avoids the issue GT had cause it isn't just 'and then they transform to the NEXT level of super saiyan, but suddenly theres and EVEN STRONGER bad guy waiting again' which was already stale by the time buu came around (not that i didn't enjoy buu saga, but it was kinda as far as you can push it before the bubble bursts)
