There are a lot of day traders who want to make a quick buck and get out. They forget this stock may be the answer for their many plays (short-term), they don't want to see in a grand scheme(long-term) that this thing has great potential to be quite huge. All they do is demand for an answer. In the real world things do sometimes take a bit longer than stated. In this case, everything seems to have been inked already; it's just a matter of time before the company can put things together to make the official announcement.
Suppose we don't get a PR pre-hour, so what? The deal is already completed. If people want to bail, they may risk coming in higher than what they want, before Tuesday. This is a game and in pennyland the MM's are playing referees. It's your call.