According to Wrestling Observer Newsletter, Del Rio will be free to join whatever company he wants after this month. AAA is very interested in Del Rio returning, and there have been talks of him returning to Lucha Underground for season four.
TNA was also interested in the past, although they may not have the money to pay him. He has also talked with NJPW, although the reports says that it might not lead to anything since Del Rio has said before he is uninterested in doing long New Japan tours.
Del Rio last wrestled on August 16th. He lost to John Cena on Smackdown and then was suspended for 30-days for a violation of the WWE Wellness policy.