With the recent news of Hey Arnold returning to TV with a movie and possibly more specials and a miniseries (according to Chris Viscardi in The AV Club) Nickelodeon is currently formalizing a quest to build it's future by tilling it's past, in other words reviving it's older shows.
Two of the shows that are being discussed for a future revivals are Rugrats and Danny Phantom. On September 3, 2015 The Independent repoterted that ''A Nickelodeon insider told The Independent that Rugrats could soon be back on our screens too.'' meaning that someone who works at Nickelodeon definitely knows what's going on for that show.
As for Danny Phantom well... this happened.
If Danny Phantom was to be revived it would have to be tweaked to appeal for today's modern audience.
The company recently launched “The Splat!” a primetime and overnight block of classic programming, on its Teen Nick cable network.