Toy catalogue are not always accurate with actual show. The recent example is in Build toy catalogue, we has GoldScorpion Full Bottle set but this full bottles is canceled because unknown reason and never appeared in the show. Same with Dark Ghost using Darwin Damashii in toy catalogue. But in the movie, Takeru Tenkuji (Kamen Rider Ghost) are become true user of Darwin Damashii. Probably Patren Ichigo will be become the real Siren Striker user in the show.

Is it me, or does the Lupin Magnum remind me of G1 Megatron?

I was thinking more G1 Shockwave. :)