Hola Benhur

I'm afraid we can't use the subjunctive vea here because with si clauses using the present tense (even though it is something one sees as a possibility/future thing, as you are saying) we need the indicative:

You can use the Imperfect Subjunctive, and then the conditional tense, to express this:

Have a look at these two Kwiziq lesson on si clauses:

Si + present indicative

Si + imperfect subjunctive

I hope this clarifies it.

Saludos 

Inma