Could anyone pitch an idea for an original movie franchise?

The Varangian Guard

A historical film (hopefully to spawn a franchise) based on the 10th and 11th century Vikings that became the personal bodyguard for the Byzantine Emperor.

The duties and purpose of the Varangian Guard were similar—if not identical—to the services provided by the Kievan druzhina, the Norwegian hird, and the Scandinavian and Anglo-Saxon housecarls. The Varangians served as the personal bodyguard of the emperor, swearing an oath of loyalty to him; they had ceremonial duties as retainers and acclaimers and performed some police duties, especially in cases of treason and conspiracy. They were headed by a separate officer, the akolouthos, who was usually a native Byzantine.

The Varangian Guard was only used in battle during critical moments, or where the battle was most fierce. Contemporary Byzantine chroniclers note with a mix of terror and fascination that the "Scandinavians were frightening both in appearance and in equipment, they attacked with reckless rage and neither cared about losing blood nor their wounds". The description probably refers to berserkers, since this state of trance is said to have given them superhuman strength and no sense of pain from their wounds.When the Byzantine Emperor died, the Varangians had the unique right of running to the imperial treasury and taking as much gold and as many gems as they could carry, a procedure known in Old Norse as polutasvarf ("palace pillaging"). This privilege enabled many Varangians to return home as wealthy men, which encouraged even more Scandinavians to enlist in the Guard.

Prologue: Following an series of meteor impacts on Earth, a deadly virus contained inside the meteors kills most of the planet's humans except those with a genetic mutation that makes them immune.

Story One: A young philologist expert in ancient classical Mesopotamian languages is in the London tube when the first meteor hits above ground though several miles from the tube station near the British Museum where she works. Mistaking it for a bomb, the passengers panic and start a stamped for the exists. The philologist is injured but manages to get out and to the museum where she learns it's not a bomb. 

Several months later, she is helping out at a hospital where people are dying in by the thousands as she is one of the immune. Most governments have collapsed at this point, but due to so many people dying suddenly there is little chaos, the still healthy people tend to be calm and rational. 

While at the hospital, some people from NASA contact her to help translate some ancient cuneiform writings on a stele that were discovered just prior the meteor impact. The writings were discovered by a Mars rover, but has been kept secret from the public. They are also undecipherable. They ask her to be part of a team that will travel to Mars to recover the stele and find out who placed it there. 

She agrees and trains for the space flight using a launch vehicle built by a billionaire (similar to Elon Musk, but not him). Once there...after the ship and crew suffer a near fatal mishap...land on Mars to discover a deep cavern containing more writings and a room filled with liquid filled crystal vessels. She manages to translate enough of the writings to find out these are instructions left by the alien race on how to build star-ships and terraforming machinery. Also there are maps of all the nearby planets that can be transformed to support earth life. The vessels contain a Fountain of Youth-like elixir...but one only females can drink without fatality, but renders them barren...that also confers increased intelligence and the ability to tolerate faster than light travel. 

Story Two: Seven hundred years later, the philologist has risen to be the one of the ruling council of transformed women called the Dames and has returned to Earth with her fifth male partner (the other died of old age) to show him her home planet and how beautiful it is compared to the dustier frontier planets still undergoing terraforming.

Human males are concubines to the Dames, though most humans still live as people did before the meteor impact, no one is forced to take the Elixir, but all people are under the subjugation of the Dames. 

However, a plot is underfoot to change all that....