About the system specs

Will these system specs be way more steep than what they’ve been releasing on steam on the MCC? Should it be too different? If i’m able to play the halo games without lag should i do so with this game?

Yes, considering that it’s the most recent, and technologically advanced, Halo to date, I would assume that it will have the highest system spec requirements for PC.

We don’t know how high those specs will be yet. I would expect to hear info on specs possibly in July, around the time of the Microsoft first-party games presentation.