General Grievous will have a cough. When asked whether any of Grievous’ past will be revealed, the only response is, “You’ll be happy.” Filoni also says that when it comes to big legacy characters like Grievous, Lucas is consulted directly.

From what we've seen GG acquired said cough After abducting the chancellor. Will the story go beyond the start of rots? or is Lucas goin gto revise history again?

"Lucasfilm Animation had nothing to do with some 3-D animated stills recently “leaked” on the internet. They were fan-produced."

I'd assume that could be in reference to 'tales of the new republic'- in which case they are aware of it and haven't done anything NASTY yet.

"continuity is being taken very seriously by the creators of the series"

"Lucas retains the right to make slight adjustments for the sake of the story."