What should you expect? About anything. You are dealing with living animals. Things might go extremely smoothly with absolutely no issues. Chickens might die or get seriously injured. You typically read about the times there are problems on here but often it's not anywhere that bad. Why are you going to ask for help when things are going well?
One of the big issues to me is how much room you have. If you free range them and don't worry about them all sleeping in the same coop it is unlikely you will have any issues. The more you crowd them either during the day or where they sleep at night the more likely you are to have issues. So for me to even guess what kinds of issues you might have I'd need to know more about how much room you have and how you will manage them.
Those pullets are at an interesting age. Some maybe laying, most probably aren't. When they start laying they tend to mix in with an adult flock much better, it's a matter of maturity. Until my pullets start laying they tend to stay away from the adults during the day and not sleep on the main roosts with the adults at night. There can be exceptions, there always are with living animals, but there are trends.
There are some things we tend to recommend to make integration easier. The more crowded yours will be the more critical these can be. Housing them across fencing so they can "look but not touch" for a week or more is often a good idea. Having widely separated feeding and watering stations can avoid a lot of potential conflict. Providing places where they can break line-of-sight or hide under, behind, or over can make life easier. Being patient and allowing them to work things out at their pace instead of forcing them into tight places where they have to fight it out can remove a lot of drama. We all have different facilities, management techniques, goals, and even chickens with different personalities so what works for me might not work for you.
I don't know how old those Amberlinks were last time but what you did worked. You have a few more chickens this year and they are going to have different individual personalities but hopefully it will go as smoothly for you this year.
Your expectations can factor into that also. My definition of a successful integration is that no one gets hurt. Some people want the chickens to cuddle up to each other, sleep together. just be one big happy family. That can come later. As long as no one is seriously injured I'm happy.