Hello, In Time Clauses we use present or present perfect not future. He'll call you as soon as he has arrived . The present perfect is used to show that the action it describes (arrive) will be complete before the other (call).
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Madhulk After I've drained this planet
of all the human information, (He still hasn't done it, right?)Doomsday will
annihilate what's left. It's a simple plan, actually. Absorb and destroy.