D..
What they evaluate at 24 months is very important, because 24 months is a benchmark in the evaluation process. It is great that you are dealing with his hearing issues. It could be that this is what has held him back. The next two months will be a time that you can work with him on his sounds and vocabulary while you spend time together. Get on the floor with him and read to him, play with him, TALK to him. Lots of talking. Even if he doesn't talk back, he'll be soaking in every word, now that he can hear better.
Hopefully with the eval done, they will get you started in speech therapy. If you have to wait, please consider hiring a private tutor to work with him over the summer. It might be expensive, but according to the evaluation, you might get help from your health insurance. Sometimes it just takes the ball rolling with delayed talkers, and they take off out of the gate. If indeed he has processing problems or worse, the sooner you start early intervention, the more likely you can make a big difference in the quality of his life later on. I really mean that.
Good luck,
Dawn