I agree with everybody posting about exercising prudent caution, but scenario that you are outlining seem to be plausible to me. I do not want to bet the farm on it coming true, but it deserves that some funds be used on this bet.
Just as a reminder, in addition to the very high interest rate, institutional ownership went up by 10M shares in Q4 2014 (from 69 to 79M). For those not familiar with this, see
this post and the following discussion for more details on significance of this.
Unfortunately, we do not know
the results of the Q1 2015 yet - they are due on May 15 - but I doubt that institutional holders were not continuing to load up during the relatively flat Q1. This in combination with high short interest spells real trouble for those holding TSLA short. They are in real and imminent danger.
I do not believe that Tesla will be talking about financial details of their new business during the 30th of April event, as they will most likely concentrate on explaining the product lines (home, commercial, utility grid storage). This will free the necessary time to talk about financial side of the business during the ER call. This, perhaps, will give shorts an opportunity to double down during the lull after the event that I think will be dedicated mostly to the technical side of the stationary storage business.
However, given the fact that two analysts already are throwing numbers that need to be added to the PT to account fro this new stationary storage business, it would be highly unlikely to not have questions about the financials and stationary storage business model during the ER call. This will allow analysts to put out updated models after the ER.
Just to make sure, there is no certainty to the sequence of events outlined above, but they are plausible and can result in explosive stock move post ER. This deserves a carefully and prudently sized bet imo.