I'm hoping to see Cool Ranch, Mooshu, Aquila, and Tavern 5 companion promotions. Mostly looking forward to seeing the promoted Bison Chief, Bison Scout, Froggo Villa, Lefty, Dan Drake, Taro Moomori, Yakooza Thug, Samocles, and Hawkules. - Noble Valerian Hawkins
Welcome to the Message Boards,Noble Valerian Hawkins! I agree, Froggo Villa is certainly due for one, Lefty & Yakooza Thug have had one already, Shiruku Nekko, Ju Hao & Monkey King ought to get one. Tavern 5 companions have had 3 so far, I don't believe they'll get another soon.
Post Edit: Sorry, I made a mistake! The Tavern 5 have had only 2 promotions ( their last one at level 36. ) Yes, they could be due for a promotion in the future.