The Sun reversed indicates that Marco may not be ready to welcome the love of his life. He may be confused or disillusioned and therefore not sure if he can open up to a new love. However, the general meaning of the reversed Sun suggests that Marco has the ability to recognize love when it comes and embrace it with enthusiasm.
The High Priestess shows that Marco was able to look inside himself and figure out what he really wants in life. He got to know himself better and became more aware of his choices than he did. The High Priestess urges Marco to follow his feelings and to do only what he feels is right. This suggests that if Marco does meet the love of his life later this year, it will only be if he feels it is right to do so.
In conclusion, the cards seem to indicate that Marco could welcome the love of his life by the end of the year, but only if he feels right to do so. Therefore, the probability is high but not guaranteed. One could say that the most likely answer is: Yes.