I think she was fantastic in SPECTRE. I'd personally like to see her return as Lucia Sciarra for the next film. Although I wouldn't like to see her evolve into some sort of "mafia boss" like she said. Maybe a secondary femme fatale (with plenty of screen time) could be good.

OT: Just for posterity I would like to note that halfway through Oct. 2017 the Mirror first reported that Craig wanted Bellucci to return, saying; "One insider told us: 'He wants Monica Bellucci back, that’s for sure.' " Then three weeks later Variety (very credible source) listed the rumor in their article because Bellucci recently stated that she “can’t say anything” when a reporter brought up the Mirror's rumor to her. Today Bellucci confirmed the Mirror's rumor by saying in an interview with the Business inquirer that: "I know that not long ago, Daniel said, ‘I’d like to do the next Bond movie with Monica. I think it’s a very good idea.' " Seems like the Mirror might have a good insider source on their hands, unless she was talking about the rumor itself and hadn't spoken with Craig or someone close to him and/or EON. Nevertheless, it's probably best to keep tabs on their reporting.

Links:

• https://www.mirror.co.uk/3am/celebrity-news/james-bond-star-daniel-craig-11342764
• http://variety.com/2017/film/news/will-monica-bellucci-return-bond-girl-bond-25-1202609803/#article-comments -
• http://entertainment.inquirer.net/261992/monica-bellucci-makes-bond-film-shed-like-lot-fight-scenes-daniel-craig