This is an idea i got after reading
this fic. What if the Ellimist gave David a second chance at life after Crayak abandoned him? The thing is it would be in another reality, the Buffyverse circa 1998 to be specific. Thanks to the nonuse of actual years in Animorphs I can explain away that he was really into the show and committed to memory everything that would happen from the point he finds himself in the Buffyverse all the way to 'Not Fade Away' about six years later.
I envision it as one fic for each "season" plus two extra.
The first one would be exclusively Buffy season 3 with David trying to find a place in the 'verse.
The second would the extra one and would be him on a quest for something (I know what it is, but I'm not telling til I get a good way into the first fic. If you think real careful you might guess.)
The third would be season one of Angel with a possible trip to Sunnydale at some point.
The fourth would be a mix, though primarily Buffy rather then Angel.
The fifth would be a comparatively short piece set at the end of seasons 5 and 2 of Buffy and Angel respectively.
The sixth would be mostly David away from both LA and Sunnydale before leading back into Angel towards the end of season 3.
The seventh would be Angel season 4 up until a canon transition over to Buffy season 7 all the way up to the end of the series.
The eighth would have him showing up at Wolfram & Hart for season 5 of Angel.
Questions? Comments? Snide remarks?