Timeline.

Since this amalgam between Marvel and Harry Potter world, a few things are different.

The marvel side of world wil be a mix of both comics and movies.

I will mainly consider marvel 616 for the comics part.

Timeline.

Hogwarts was established in 6 A.D, since in marvel comics and real world, camelot existed in 6 century A.D.

If Merlin was a student in Hogwarts than Hogwarts should be built in 6 century A.D.

The battle between Dumbledore and Grindlewald took place in 1945.

Voldemort was born in 1930.

MACUSA AND SHIELD formed an alliance in the 1970s to keep statutes of secrecy intact with increasing technology.

1994, Severus was born.

2007, Fantastic Four formed.

2009, Avengers was formed.

2009, a New organization SOS was formed to keep the statute of secrecy due to the constant attacks by Voldemort on muggles.

2009, Alliance between SOS and SHIELD was formed.

2010, Severus' mother was murdered.

2010, the story begins from here.