Expect working conditions to keep getting worse until you decide to leave (no matter what the CEO or management claim to you, they got their payday, they don't give a shit anymore, they're almost all getting out as soon as they can).
Raises and promotions will likely freeze, benefits will likely change and become worse (at least I've never seen them get better from a merge), you're probably just going to get stuck where you're at, if you were a permanent employee at least. People will steadily leave, and the company will probably try to just dump their responsibilities on someone else, and be slow to hire replacements (if they do at all).
Considering you're a remote contractor, some of that might not apply to you directly, but you still might get more work dumped on you as other employees start leaving.
I don't know about options, I never worked for a company that had options that ever ended up being worth anything.
I've stayed way too long after a merger before, things never got better, even after several years, they just kept getting worse, and promises made to me kept getting broken. I won't make that mistake again.