With all these changes in upcoming betrayal league, such as crafting and masters.
How much is going to change the standard?

Are they gonna just keep delve to standard with all the regular masters, crafting, etc..?
Then, have whole new betrayal as new league till its over?

no

As in, Standard will not change? Such as old masters are going to remain till betrayal end?
Master Crafting will be available? Or, we will be craft but, just no veiled crafting?

On.

There is info on their official site in the announcements -section.

Old masters except zana will be gone completely and replaced by new masters (niko the mad etc)
Standard gets that change as well.

We don't exactly know how it will turn out until next week.

Atlas is also reworked and maps will get a new "set", which means they will look different and map tiers will change somewhat.

im scared

you should be since this is not scare tactics