Bob Morley hinted at a new romance for Bellamy in "The 100" Season 4 in a recent interview. He teased that Bellamy and Luna might end up together.
Morley briefly touched on Bellamy's relationships in "The 100" Season 4, where he talked about Clarke and Luna. The actor teased that his character might get romantically involved with Luna. He called their relationship a "work in progress."
"Bellamy's relationship with Luna is very much in development. I don't know how much I can tell you in regards to that without destroying it or getting fired," Screener TV quoted Morley as saying.
There is a likely chance that Luna and Bellamy could grow closer together through Clarke. In "The 100" Season 4, he and the Skaikru leader once again teams up to save humanity. They would need all the help they could get from the other Grounders, which would of course include Luna. After all, according to the publication she and Clarke have developed a deep connection. If Luna sticks around for long around Clarke then it is likely that she forms a bond with Bellamy too.
The possibility that Bellamy and Luna becomes a couple, in "The 100" Season 4, is vague. However, if this happens then it would definitely affect Bellarke shippers. In the same interview, Morley acknowledged the frenzy for Clarke and Bellamy to become romantically involved. However, he did not give any hint that this happens in the instalment.
Likewise, Eliza Taylor (Clarke) subtly hinted that there is no Bellarke romance in "The 100" Season 4. The actress told TV Line that Clarke would still be grieving for Lexa when the show opens, so it is still too early for her to move on to another relationship. Besides, the Skaikru leader would not have time for relationships, since she would be too preoccupied trying to save her people from the nuclear apocalypse.