Highlight Video from multiple projects

Trying to figure out the best method for compiling a season long soccer highlight video.  As the season is about to start I'd like to have a good workflow in place before it starts.  Each game is ~one hour.  I use Premiere Elements to combine all the individual mp4 files and I also overlay a scoreboard that runs at the bottom for the duration of the video.  That video then gets uploaded and shared with the team.

I want to edit the highlight clips throughout the year and I would also like to have the scoreboard included in the highlight video so ideally I'd like to import each individual game into a combined project which I would maintain throughout the season.  I believe this is not possible in elements.  The second possible option would be to export each individual game and then create a new project using the exported version of each game.  I'm not sure if this will maintain quality or what steps I could take to ensure the final highlight video was still high quality after being encoded twice.  I've always used H.264 but is there another that could prevent quality loss?