Indeed, if you want to increase your share, now is the time. This will turn out to be a once in a lifetime opportunity. I think we can be pretty sure the merger will be completed. A letter of intent is allready a big step ahead after preliminary negociations.
From Wikipedia :
"A letter of intent or LOI is a document outlining an agreement between two or more parties before the agreement is finalized. The concept is similar to the so-called heads of agreement. Such agreements may be Asset Purchase Agreements, Share Purchase Agreements, Joint-Venture Agreements and overall all Agreements which aim at closing a financially large deal."
It's like a conceptual contract. So if this is allready signed, this means there are no significant obstacles anymore to overcome.
Go merger go ! 0,1 $ - here we come.