The auto DI4 announcement is long overdue and this might be it!
A word of caution though, an auto DI4 announcement could be a full on licence agreement ie commitment to manufacture in the short/medium term OR an announcement of "intent" ie OE and the Euro merely enter into some ongoing testing program (which would probably require up front $$ and hence the need to disclose to the market) which may eventually lead to the signing of a licensing agreement.
If the announcement is a licence agreement then the share price will probably take off and not look back. However, if the agreement relates to some testing program, market reaction maybe harder to predict. In other words, don't get too excited if the announcement is anything other than a licensing agreement - the market may hold and wait for further commitment before buying!