As noted earlier, there was no way WWE would allow Chyna to appear on RAW. Although you "never say never" when it comes to pro wrestling, you will never see Chyna in a WWE ring again due to her new career in porn. The company wants nothing to do with her due to this and other issues (drugs, erratic behavior etc.). It should also be noted that her DVDs and home videos will be sold in stores for the rest of her life so she'll never be returning to WWE. By entering the porn industry, she basically committed "career suicide" as it pertains to WWE. Partial Source: The Wrestling Observer Newsletter
Shame that they do not want her just because she does that type of thing. I know it does not fit well with the PG image but no one really likes the PG image anyway and anyway who was in the PG era would not know her pornstar ways. So I do not really understand it.