I'm guessing $1 to 2.5 million ($1.75 million +/- $0.75 million). But, I haven't been right, yet.
Main source of revenue would be from selling RR broadcast and streaming rights in China. Revenue range is from selling just season 1 to including half to all of season 2.
Half of RR S2 aired on Nick Jr. in Q4, so Q4's should have included payment for it. Andy has said payment is due when shows are delivered and ready to air.
I don't think licensing and royalties will be much higher, even though there was more (LL) merchandising product available, during the Christmas buying season. I'm thinking advances still need to be earned out. I'm happy to be wrong here.
Edit
I forgot about the increased airing of RR on Nick Jr., but I don't know how much additional revenue it would generate