A Black Widow TV series is somehow simultaneously the most likely option on this list and the least likely. While she is the only character discussed who is already an integral part of the MCU, Marvel seem so uninterested in putting the character in a leading role that it probably won't happen. However, a Black Widow prequel series that explores Natasha's murky past which is alluded to in the movies would be fascinating to see. Focusing on a younger Romanoff would also get around the issue of contracting Scarlett Johansson to do a time-consuming TV show. Although whoever replaced her would have a tough act to follow. A regular role could also be found for that other Avenger who needs to be further explored - Hawkeye. The series could focus on how the two first met and joined SHIELD. Seeing as the pair are globe-trotting secret agents, the series would have a different feel from Marvel's currently New York-rooted series. Come on, you can't say you wouldn't watch this! Is there a Marvel character who you really want to see make it on-screen? Leave your thoughts in the comments.
