If the timing is off, then most likely not get any spark since the computer is seeing a mismatched signal from the Cam / Crank sensors, and it is not allowing the ASD Relay to disengage. The cams do rotate a little when you remove the tension from the timing belt when replacing the water pump.
To check the timing, rotate the engine till it is at Top Dead Center (There is an arrow on the Crank Sprocket and TDC labeled close to it - Put the arrow there) and look at the Cams. There is a dot on each cam sprocket and 2 on the timing housing. If one or both off you would need to reset the timing.
There is an FSM (Factory Service Manual) On here that gives better details on timing the engine.