In the final episode of "The Big Bang Theory" (S12E24), it seems like the creators of the show wanted to "come full circle" with the all of the characters.
Some examples of this are:
1. Sheldon and Amy getting a Nobel Prize,
2. Leonard and Penny expecting a baby,
3. Howard and Bernadette becoming used to the fact that they are parents.
During that episode,
Raj meets an actress on the way to Sweden, and she comes along with him to the Nobel award ceremony.
Later on, Raj tries holding hands with her and although she refuses and says that it's "not a date", it seems like she has some interest in him. Is this a subtle nod from the creators that Raj may have finally found his wife, supported by the fact that Raj would have a nice ending like the rest of the characters, or is this just another temporary girlfriend that will dump him?