I hope there is season 11 of The Fairly Oddparents since season 10 was terrible, only because Poof and Sparky are taking out of the series and replace by Chole who makes the show worst and change the opening title of the series. And I hope Sparky and Poof return one day for the rest of the series.
Pooff was not taking out of the series . The only one who was taking out was Sparky. It was because sparky got extremely negative reception both from the network, and the audience
None of the new characters are responsible for the last several years of bad writing. I find Timmy's Dad and Crocker (whom was a GREAT character in older episodes) more annoying than Chloe, Poof, Sparky, Kevin or the Fair Bears.
I think at this point, it would be better to do another movie and then call it quits. A big, proper finale, bringing back some of the old characters, a homage to the show's long history, and then say sayonara.
Sparky's thing for me is not a problem
Anyway, I think season 11, if any, I think will arrive in summer 2018