Both fighters real close to retirement and if Bellator just ends here it would be great but unlikely to see Mousasi jump over to KSW for a double retirement fight vs Khalidov.
You would have the former 2x Bellator MW champ/3x Dream champ/1x Strikeforce champ/1x Cage Warriors champ who is 38 years old and 49-8-2 in MMA vs the 3x KSW champ who is 43 years old and 37-8-2 in MMA.