If this was relocating due to the "merger" and you would have been out on the street otherwise, if and when more work becomes available at your home domicile, those positions will be offered to workers displaced from that domicile. Offered in order of seniority. You get one shot to come home, if the new run at your old domicile isn't what you want and you pass, that's it. End of story. If more than one year goes by and no recall offered is tendered, that's it.
Be careful what decisions you make. If your transfer is a voluntary one, that is, if you saw something better somewhere else and volunteered to move, that is different.
Hopefully dick was helpful.