Hiya,
First time posting here.

I used to read comics back in the late 90s, and I've recently come back since Marvel Now.

I really respect writers that can "world build" and bring depth and mythology to a series.
As a result, I have found myself glued to the New Avengers storyline.
With the Illuminati, Builders and what seems like time coming to an end, this has really caught my attention.

I'm reading various series under the Marvel Now banner as well, All-New X-Men, Uncanny X-Men, Uncanny Avengers.

However, I feel like I am constantly lost with New Avengers.
Sometimes it feels like I have skipped 2 books when I have been reading each issue religiously.

Are there any good guides out there online that maps each Marvel arc, and the required reading for them?
I'm really enjoying these books, but getting increasingly frustrated when the story seems to jump ahead without letting me know which other books I need to read.

At least the whole Builders arc had a backpage that showed the story arc progression.

Any help you guys can provide would be very much appreciated.

Read Avengers alongside it, they're very interconnected. It's even where most of the Builders storyline started. That should sort most of your confusion.

You should know the basics of the characters and the infinity gauntlet already. The only recent event before Marvel Now that affects it is that Namor was possessed by the Phoenix (a cosmic force) and flooded Wakanda, hence the tension between Namor and Black Panther.

That's all I can think of, Hickman tends to use his own loose ends to set up arcs, so you should be okay if you have his two series