Seems to me you would be best served by a single code base, where the app checks roAppInfo.getID() and based on that acts like the according app... no need for workspacing/code duplication. The actual Channel Store descriptions and images are entered in the dev.portal web site, so there is little (if anything) to vary in each bundle.
Having such app, i would expect on start after determining under which channel ID it is running, code will contact web service and based on that receive exact configuration (content, chrome, customizations).
Or, even simpler - why not just use Roku Direct Publisher where there's no need for coding but just populate online form with JSON feed for the content, if that would work for the use cases?
How about splash image defining in manifest file that shows up during startup? Is there a way to make it dynamically?
good question! i am not aware of way of doing that, may be a good feature to ask for.
Couple of workarounds to that: