Hello and hope you are doing well.
It is difficult to predict what the prognosis will be. Strokes can be caused by either clots or bleeds. Sometimes you start with a clot, take anticoagulants and end up with a bleed. The etiology of the stroke is important. For example, a small stroke can be caused by simple dehydration. The human brain has great redundancy. In some cases memory is damaged. In other strokes only partial paralysis may be involved, which may disappear. So, prognosis will depend on the type of stroke and the status of other conditions, like the present stage of lung cancer and the therapy given. And seizures need to be controlled with antiepileptic medications.
Hope this helped and do keep us posted.