Realised I never replied haha. 737-800 is the most numerous type of the NG’s and we see many of those liveries in-game, 120 to be exact, but there are a lot still missing of ones I think they will add (Ones that have significant importance or which are missing in-game on irl routes) and using the directory there are 317 livery requests for that type alone. Then for the rest you have 49 for the -900/ER (Majority of 900 operators operated the ER too so lumped together), then 137 -700’s, only 14 -600’s but hopefully that number means my beloved will be added in full 
. I don’t see more than half of each, likely less for the -800, being added.
Then you have the MAX’s, 83 MAX 8’s and 26 MAX 9’s of which I can see most added. Not including the MAX 7/10’s which we’re not sure are coming.
Then you have the classics, -300 with 214 liveries suggested, 139 -400’s plus the 10 in-game and 113 -500’s. Likely to see half or less of each but that’s a lot of liveries to be made by one man (Big round of applause for Honza).
And then ofc you have the -100/-200’s of which we have 5 -100 liveries and 116 -200 liveries suggested.
Then freighters, 13 -200’s, 43 -300’s, 27 -400’s plus the 22 in-game, 1 -500 (I can’t see this coming as a variant since one exists in the world), 2 -700’s (Maybe with this as Alaska operates it but we’ll see) and then 34 -800’s with the 24 in-game too.
Very likely could be done sooner but I think Honza might lose his nut and honestly for his sake I hope he takes his time with them. I’d be happy to see them by Christmas but if they want them sooner I’d happily take a surprise Mad Dog Christmas present 
.
But yeah, a lot of liveries to be painted and tested to make sure they work correctly at all airports and in all the different lighting conditions, not including all the player liveries they have to add to each.