I finally have the rest of the story, Coming of the Scooby Army posted in the spanderverse community:
Ch 17 - A Temporary Calm
Ch 18 - Bad News
Ch 19 - Danger on the Horizon
Ch 20 - Trials and Tribulations
Ch 21 - Extinction
Ch 22 - The Day Before Doomsday
Ch 23 - Down to Two....
Ch 24 - Strike
Ch 25 - Last Stands
Naturally, the story ends in a cliffhanger sort of thing and doesn't resolve the story completely....