User blog comment:Yellowlightning1996/Timeline theory/@comment-24744495-20180829172716

Here is what I think are the two main animated timelines and the live action timeline are:

Timeline 1:

Where Are You?

The Scooby-Doo Show

Scooby and Scrappy-Doo (first series with full gang)

The New Scooby and Scrappy-Doo Show

The New Scooby-Doo Mysteries

The 13 Ghosts of Scooby-Doo

Timeline 2:

A Pup Named Scooby-Doo

Where Are You?

New Movies

The Scooby-Doo Show

What's New?

Scooby and Scrappy-Doo (first series with full gang)

Scooby and Scrappy-Doo (second series without full gang)

Scrappy & Yabba-Doo

The 1998-2001 DTVs

The rest of the DTVs I agree with your order

Live Action Timeline:

Mystery Begins

Lake Monster

Scooby-Doo (2002)

Monsters Unleashed