Yes, I really like this idea. Keen to see it as an option in the Moodle 2 implementation, although there needs to be the ability to turn this image off, as there may be sequences where showing this would "give away" some important aspect of the sequence that the teacher wants to keep hidden. But I think this is rare enough that the default setting would be to show the image unless you click something to turn it off.
On this general idea, I remember long ago thinking about having a special LAMS tool which was an "introduction to your sequence" tool that would be at the beginning of every sequence automatically - it would just be a Noticeboard for introducing the sequence - but would have a special feature to allow it to show this if the teacher wanted. Such a tool could also have other settings that relate to a whole sequence rather than individual tools (eg, if we had the concept of global properties, they could be implemented here).
In practice I think it is too late to implement an "automatic first tool" concept in LAMS now, but perhaps we could add an Advanced option to the Noticeboard tool to show the image of a sequence, and then those who like this idea could click this on a Noticeboard at the start of their sequence. This setting would be off by default
Posted by James Dalziel