It doesn't seem to me that that's a problem. You just put data in and expect data out.
For example, a weather continuation model could take in all the available weather data up to the present moment and provide a continuation of that, i.e. a weather forecast.
For example, a weather continuation model could take in all the available weather data up to the present moment and provide a continuation of that, i.e. a weather forecast.
Likewise financial market predictions etc.