An immediate takeover would limit the upside to around 100%.
Potential upside during the drilling stage, could be multiple, as evidenced via PLS and KDR, imo.
Here were how KDR & PLS performed during the drillings.
I expect AVZ to follow a similar path.
KDR, started drilling on 10 August 2016, price was up from 33.5c to 82c on 4 October 2016.
PLS, had a stellar run during the drilling.