Season 26 production for ”The Simpsons” underway!

Recently, long-time Simpsons writer Michael Price (and fellow Jersey native) tweeted a pic showcasing that production for season 26 of The Simpsons is under way!
This fall season for The Simpsons already sounds like a busy one as it will feature a cross-over episode with Futurama. Plus the Griffins of Family Guy lore head to Springfield!
That said, there’s still a whole bunch of The Simpsons to get through on season 25, and that continues this Sunday Night on FOX @ 8 pm EST, check your local listings!
Table read 2 of Season 26! pic.twitter.com/oiYBBH0T5T
— Michael Price (@mikepriceinla) March 13, 2014
"There are also other characters that come and go (also owned by the Warner Bros. Discovery conglomerate media company)."
Huh. Is that just referring to other characters from the show itself, or is this implying that the new season is going to have cameos from other WBD IPs